Undrawn, tough, durably melt-bonded, macrodenier, thermoplastic, multicomponent filaments
AssigneeMinnesota Mining and Manufacturing Company
InventorsPhilip G. Martin, Gary L. Olson, Dennis G. Welygan
Life of this patent
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Abstract
Undrawn, tough, durably melt-bondable, macrodenier, thermoplastic, multicomponent filaments, such as sheath-core and side-by-side filaments, comprising a first plastic component and a second lower-melting component defining all or at least part of the material-air boundary of the filaments. The filaments can be made by melt-extruding thermoplastics to form hot filaments, cooling and solidifying the hot filaments, and recovering the solidified filaments without any substantial tension being placed thereon. Aggregations of the filaments can be made in the form of floor matting and abrasive articles.
Claims15
A macrodenier multicomponent filament comprising:
- (a) first plastic comprising synthetic plastic polymer;
- and
- (b) second plastic comprising lower melting, synthetic thermoplastic polymer having a melting point at least 15.degree. C. lower than the melting point of said component (a);
- said components (a) and (b) each having a flex fatigue resistance greater than 200 cycles to break and being, along the length of the filament, undrawn, tough, elongated, contiguous, and coextensive in length, said component (b) defining all or at least part of the material-air boundary of said filament, said filament being durably melt-bondable in its undrawn state.
Dependencies are inferred from the claim text.